Clinical Evaluation of Pediatric Posterior Zirconia and Stainless Steel Crowns: A Comparative Study.

Objective: To clinically evaluate and compare the performance of posterior pediatric zirconia crowns with stainless steel crowns. Materials and methods: Twenty nine children [3-9 years] were selected and given 70 preformed crowns [35: preformed zirconia crowns, Kinderkrown; 35: stainless steel crowns, KIDZ CROWN]. Crowns were evaluated for retention, marginal integrity, opposing tooth wear, plaque accumulation, gingival inflammation, and proximal contact at 3, 6, 9, and 12th month. Results: At the end of follow-up period overall success rate with zirconia crown was 93.5% and that of stainless steel crown was 96.7%. Statistical analysis showed no difference between the groups. Conclusion: Posterior preformed zirconia and stainless steel crowns showed good clinical performance. Preformed zirconia crowns can be an option for posterior full coronal restoration when esthetics is of prime concern for the parent and child. How to cite this article: Murali G, Mungara J, Vijayakumar P, et al. Clinical Evaluation of Pediatric Posterior Zirconia and Stainless Steel Crowns: A Comparative Study. Int J Clin Pediatr Dent 2022;15(1):9-14.

In vitro comparison of microleakge between preformed metal crowns and aesthetic crowns of primary molars using different adhesive luting cements.

AIM: To assess and compare the microleakage extent between preformed metal crowns (PMCs), preveneered PMCs and zirconia crowns using different adhesive luting cements. METHODS: Thirty-six primary first molars were divided into three groups (n = 12) each prepared to receive different crowns (PMCs, preveneered PMCs, or zirconia crowns). Each group was further sub-grouped (n = 4) according to the luting cement (resin cement, resin modified glass ionomer cement, or glass ionomer cement). After cementation, the teeth were thermocycled, placed in 0.5% basic fuchsin, and sectioned to assess dye penetration. The results were analysed using ANOVA and Bonferroni statistical tests. The level of significance was set at p < 0.05. RESULTS: The microleakage recorded in zirconia crowns was significantly worse than that in preveneered PMCs and PMCs (p < 0.001). Regardless of the crown type, resin cement resulted in the least microleakage with statistically significant differences from glass ionomer cement (p < 0.05). CONCLUSIONS: As far as microleakage is concerned, preveneered PMCs seem to be an aesthetic and suitable alternative to PMCs. In addition, resin cement stands to be the most optimum luting cement.

Coronas estéticas de nano-resina híbrida en dientes temporales: Reporte de caso / Hybrid nano-resin esthetic crowns in primary teeth: Case report

La pérdida de dientes temporales anteriores debido a las caries, patología pulpar y fracturas coronarias ha sido reconocida como uno de los factores etiológicos más severos de los problemas dentales en el campo de la odontopediatría. Uno de los mayores avances en la odontología en los últimos años implica la adhesión al esmalte de los dientes primarios, lo que ha llevado a desarrollar muchas técnicas para restaurar estéticamente al diente. Los obstáculos en este tema son la presencia de la capa aprismática en la superficie de los dientes temporales, cuyo espesor llega a ser de 25 μ, y la cantidad reducida del esmalte. Sin embargo, los dentistas pueden superar estos factores y producir restauraciones hermosas. Las coronas fabricadas con composite para técnicas indirectas, utilizadas en el laboratorio, optimizan las características químicas, físicas y por lo general se polimerizan mediante el uso de medios físicos (luz, calor, presión, etc.), por lo que presentan superficies homogéneas y libres de poros, lo que le da una buena estética, mayor resistencia a la abrasión y una adaptación adecuada. El objetivo del siguiente trabajo es presentar un caso clínico de rehabilitación con restauraciones de composites indirectas (Signum-ceramis-Heraeus), mostrando una técnica para la rehabilitación de los dientes anteriores superiores temporales, sin la colocación de provisionales. La rehabilitación de los dientes temporales con coronas de nano-resina híbrida prefabricadas en laboratorio son una buena opción en odontopediatría.

Within the field of dentistry, loss of primary teeth due to caries, pulp conditions and crown fractures has been recognized as one of the most severe etiological factors of dental problems in the pediatric dentistry field. One of the greatest headways in dentistry in the last years encompasses the adhesion to enamel of primary teeth, this has led to the development of many techniques to restore the tooth. Obstacles that might be encountered are the presence of an aprismatic layer on the surface of primary teeth. This layer might reach 25 μ as well as the reduced amount of enamel present. Nevertheless, dentists might overcome these factors and manufacture esthetically-pleasing restorations. Crowns manufactured with composite resins and used in indirect techniques in the laboratory optimize physical and chemical characteristics and in general, polymerize with the use of physical means (light, heat, pressure, etc.). Therefore, they present smooth, pore-free surfaces, which allow for suitable esthetics, greater resistance to abrasion and proper adaptation. The aim of the present work was to present a clinical case of rehabilitation with indirect composite resin restoration (Signum-ceramis-Heraeus) and to show a technique for the rehabilitation of primary, upper anterior teeth which did not entail placement of provisional teeth. Rehabilitation of primary temporary teeth with nano-resin-hybrid crowns prefabricated in the lab represents a suitable option in the field of pediatric dentistry.